Please set property "MaxSizeKB" to restrict the size of uploaded files:
<%
Dim uploader
Set uploader=new AspUploader
uploader.MaxSizeKB=200
uploader.Name="myuploader"
uploader.AllowedFileExtensions="jpeg,jpg,gif,png,zip"
uploader.MultipleFilesUpload=true
uploader.InsertText="Select multiple files (Max 200K)"
%>
Regards,
Eric